<script type="text/javascript">
   function ajaxFileUpload() {
       $("#loading")
   .ajaxStart(function () {
       $(this).show();
   })
   .ajaxComplete(function () {
       $(this).hide();
   });
 
   $.ajaxFileUpload
   (
       {
           url: '/AjaxFileUploader.ashx',
           secureuri: false,
           fileElementId: 'fileToUpload',
           dataType: 'json',
           data: { name: 'logan', id: 'id' },
           success: function (data, status) {
               if (typeof (data.error) != 'undefined') {
                   if (data.error != '') {
                       alert(data.error);
                   } else {
                       alert(data.msg);
                   }
               }
           },
           error: function (data, status, e) {
               alert(e);
           }
       }
   )
 
       return false;
 
   }
</script>